BMW M6 Stock vs. BMW M6 Modified

M6 being filmed is completely stock with the carbon air filters removed which adds 7 hp. The video is shot from an upgraded M6 that has the Carbon Air Filters removed as well, but also has K & N Air Filters, Supersprint headers, Supersprint high flow cats, Supersprint Resonated X-Pipe, Supersprint Sport Mufflers, Dinan 3.91 Differential, Active Autowerke ECU, & Kelleners/Schrick Cam Shafts.
The difference between the 2 cars in approx. 53 HP
507 HP vs. 560 HP
Race is from 2nd gear at from 50 mph - 160 mph. The 507 HP M6 lets off the throttle during the final part of the race due to a car ahead.